Answer
$\log_2{8}=3$
Work Step by Step
RECALL:
$b^y=x \longleftrightarrow \log_b{x} =y .$
Use the definition above to obtain
$2^3 = 8 \longrightarrow \log_2{8}=3.$
Thus, the equivalent logarithmic form of the given expression is
$\log_2{8}=3.$